From: centos-bounces at centos.org [mailto:centos-bounces at centos.org] On Behalf Of Alfred von Campe > > I recently moved my CentOS 4.5 disk from a Lenovo ThinkCentre M52 > (3.2 GHz Pentium 4) to a Lenovo ThinkCentre M55 (3.4 GHz Core 2 > Duo). I had to install the SMP kernel, but other than that > everything just worked. I did have an issue with accidentally > initializing my /boot partition, but that was my own fault. > > But the system was not feeling right. Some things just seemed to be > slower, but I couldn't put my finger on it. Today, I noticed that > disk I/O was very slow to one of the disks (the boot drive, /dev/ > hda). It took over 18 minutes to unzip a set of files that used to > take just under 2 minutes on the old system. Sure enough, if I > copied the files to the second drive (/dev/sda), I was able to unzip > them in under 2 minutes again. > > When I accidentally clobbered the /boot partition, I learned that > there were two IDE controllers on this motherboard, which explained > why one SATA drive was named /dev/hda and the other SATA drive /dev/ > sda. But I find it hard to believe that there would be such a > performance difference between the two controllers/drivers/disks. > And I know the slow disk worked just fine before I moved it to the > new system. > > Any ideas what could cause a drive to be so slow? Could it be that > DMA is disabled on the drive (see the output of hdparm > below)? Also, > why does hdparm work for one disk but not the other? > > Thanks for any pointers, > Alfred See if the drive supports DMA and 32-bit IO and if it does set it with hdparm (put in the hdparm.conf to do so across reboots). And look into getting a SATA replacement, the PATA on these boards are really meant for DVD/CD-ROMs, etc. > # lspci > 00:00.0 Host bridge: Intel Corporation 82Q963/Q965 Memory Controller > Hub (rev 02) > 00:01.0 PCI bridge: Intel Corporation 82Q963/Q965 PCI Express Root > Port (rev 02) > 00:1a.0 USB Controller: Intel Corporation 82801H (ICH8 Family) USB > UHCI Contoller #4 (rev 02) > 00:1a.1 USB Controller: Intel Corporation 82801H (ICH8 Family) USB > UHCI Controller #5 (rev 02) > 00:1a.7 USB Controller: Intel Corporation 82801H (ICH8 Family) USB2 > EHCI Controller #2 (rev 02) > 00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) > HD Audio > Controller (rev 02) > 00:1c.0 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI > Express Port 1 (rev 02) > 00:1c.4 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI > Express Port 5 (rev 02) > 00:1d.0 USB Controller: Intel Corporation 82801H (ICH8 Family) USB > UHCI Controller #1 (rev 02) > 00:1d.1 USB Controller: Intel Corporation 82801H (ICH8 Family) USB > UHCI Controller #2 (rev 02) > 00:1d.2 USB Controller: Intel Corporation 82801H (ICH8 Family) USB > UHCI Controller #3 (rev 02) > 00:1d.7 USB Controller: Intel Corporation 82801H (ICH8 Family) USB2 > EHCI Controller #1 (rev 02) > 00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev f2) > 00:1f.0 ISA bridge: Intel Corporation 82801HB/HR (ICH8/R) LPC > Interface Controller (rev 02) > 00:1f.2 IDE interface: Intel Corporation 82801H (ICH8 Family) 4 port > SATA IDE Controller (rev 02) > 00:1f.3 SMBus: Intel Corporation 82801H (ICH8 Family) SMBus > Controller (rev 02) > 00:1f.5 IDE interface: Intel Corporation 82801H (ICH8 Family) 2 port > SATA IDE Controller (rev 02) > 01:00.0 VGA compatible controller: nVidia Corporation G70 [GeForce > 7300 GT] (rev a1) > 03:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5755 > Gigabit Ethernet PCI Express (rev 02) > 0a:0a.0 Serial controller: NetMos Technology PCI 9835 Multi-I/O > Controller (rev 01) > > > 00:1f.2 IDE interface: Intel Corporation 82801H (ICH8 Family) 4 port > SATA IDE Controller (rev 02) (prog-if 8a [Master SecP PriP]) > Subsystem: Lenovo: Unknown device 1011 > Flags: bus master, 66Mhz, medium devsel, latency 0, IRQ 177 > I/O ports at <unassigned> > I/O ports at <unassigned> > I/O ports at <unassigned> > I/O ports at <unassigned> > I/O ports at 30d0 [size=16] > I/O ports at 30c0 [size=16] > Capabilities: [70] Power Management version 3 > > 00:1f.5 IDE interface: Intel Corporation 82801H (ICH8 Family) 2 port > SATA IDE Controller (rev 02) (prog-if 85 [Master SecO PriO]) > Subsystem: Lenovo: Unknown device 1011 > Flags: bus master, 66Mhz, medium devsel, latency 0, IRQ 185 > I/O ports at 3428 [size=8] > I/O ports at 341c [size=4] > I/O ports at 3420 [size=8] > I/O ports at 3418 [size=4] > I/O ports at 30f0 [size=16] > I/O ports at 30e0 [size=16] > Capabilities: [70] Power Management version 3 > > # hdparm /dev/hda > /dev/hda: > multcount = 16 (on) > IO_support = 0 (default 16-bit) > unmaskirq = 0 (off) > using_dma = 0 (off) > keepsettings = 0 (off) > readonly = 0 (off) > readahead = 256 (on) > geometry = 24792/255/63, sectors = 203928109056, start = 0 > > # hdparm /dev/sda > /dev/sda: > HDIO_GET_MULTCOUNT failed: Inappropriate ioctl for device > IO_support = 0 (default 16-bit) > readonly = 0 (off) > readahead = 256 (on) > geometry = 9730/255/63, sectors = 80032038912, start = 0 > > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos > ______________________________________________________________________ This e-mail, and any attachments thereto, is intended only for use by the addressee(s) named herein and may contain legally privileged and/or confidential information. 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